As a Pokémon expert, I can tell you that evolving a Nuzleaf into Shiftry involves a unique method. In the Pokémon games, Shiftry does not evolve through the traditional experience points (XP) system. Instead, **Nuzleaf evolves into Shiftry when you use a specific item on it, which is the **[Dubious Disc](https://bulbapedia.bulbagarden.net/wiki/Dubious_Disc_(item))**.

Here's the step-by-step process:

1. Obtain a **Dubious Disc**. This item is typically found in specific locations or given to you by NPCs in the game, depending on the version you are playing.
2. Make sure Nuzleaf is in your party.
3. Use the Dubious Disc on Nuzleaf while in your party. The game will prompt you to confirm the use of the item.
4. If you confirm, Nuzleaf will evolve into Shiftry immediately.

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Select Nuzleaf to evolve it. After pressing "A," your current party will be displayed on the screen. Select Nuzleaf from the list, and press the "A" button to confirm using the Leaf Stone on it. Wait and watch as Nuzleaf evolves to Shiftry.read more >>